<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        html,body{height: 100%;}
        .headerinfo{
            height: 100px;
            background-color: #ddd;
        }
        .left{
            width: 20%;
            height: 100%;
            float: left;
            background-color: rgb( 231,208,208 );
        }
        .right{
            width: 80%;
            height: 100%;
            float: right;
            background-color: rgb( 200,250,202 );
        }
        .menu{
            margin: 20px;
        }
        .filesDiv{
            margin: 20px;
            background-color: rgb( 223,238,247 );
        }
    </style>
</head>
<body>
    {% block header %}
    <div class="headerinfo">
        头部
    </div>
    {% endblock %}
    <div class="left">
        {% block left %}{% endblock %}
    </div>
    <div class="right">
        {% block right %}{% endblock %}
    </div>
</body>
</html>